Abstract
Dense ultra-thin nanocrystalline La0.6Sr0.4Co0.8Fe0.2O3 (LSCF) films with thickness of ∼50 nm, have been sputtered on nanoporous anodic alumina-supported nanocrystalline thin film yttria-stabilized zirconia and patterned by photolithography into microelectrodes. This approach enables low-temperature (425-550 °C) electrochemical properties of dense ultra-thin nanocrystalline LSCF to be characterized. The results reveal that the electrochemical resistance of nanocrystalline ultra-thin LSCF is dominated by the oxygen surface exchange reaction at the electrode surface with an activation energy of 1.1 eV. Area-specific resistance of LSCF was obtained and the results are of potential relevance to utilizing nanostructured oxide cathodes for micro-SOFCs operated at low temperatures.
Original language | English |
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Pages (from-to) | 589-592 |
Number of pages | 4 |
Journal | Journal of Power Sources |
Volume | 193 |
Issue number | 2 |
DOIs | |
State | Published - 5 Sep 2009 |
Keywords
- Area-specific resistances
- Cathode
- Lanthanum stronium cobalt ferrite
- Microelectrode
- Nanocrystalline
- Solid oxide fuel cell
- Ultra-thin films